Specifications

YORK INTERNATIONAL 59
FORM 160.48-O1
tube simultaneously and insert the exploring tube
for 5 seconds - this should be long enough to draw
into the detector any refrigerant gas that might have
leaked through the tube walls. A fan placed at the
end of the cooler opposite the torch will assure that
any leakage will travel through the tube to the torch.
5. Mark any leaking tubes for later identification.
6. If any of the tube sheet joints are leaking, the leak
should be detected by the test torch. If a tube sheet
leak is suspected, its exact location may be found
by using a soap solution. A continuous buildup of
bubbles around a tube indicates a tube sheet leak.
ELECTRICAL CONTROLS
the Wiring Diagrams. These diagrams also contain a
starting and stopping sequence and timing sequence
diagram.
2. Oil Changing - The oil in the compressor must be
changed annually or earlier if it becomes dark or
cloudy.
COMPRESSOR MOTOR
1. Check motor mounting screws frequently to insure
tightness.
2. Meg motor windings annually to check for deteriora-
tion of windings.
PRESSURE TESTING
The chiller should be pressure tested annually. Any leaks
found must be repaired immediately. If frequent purg-
ing has occurred, the unit must be pressure tested as
soon as possible to prevent air and moisture from en-
tering the until. Air and moisture are the worst enemies
of the R-123 system and experience has shown that
units which are maintained tight, are systems that will
provide trouble free efficient operation.
COMPRESSOR
For information covering the MicroComputer Control
Center operation, refer to Section 2. The operating points
of the pressure and temperature cut outs are shown in
SECTION 8
PREVENTIVE MAINTENANCE
Maintenance for the compressor assembly consists of
checking the operation of the oil return system and
changing the dehydrator, checking and changing the oil,
checking and changing the oil filters, checking the
operation of the oil heater, checking the operation of
the oil pump, and observing the operation of the com-
pressor.
Internal wearing of compressor parts could be a seri-
ous problem caused by improper lubrication, brought
about by restricted oil lines, passages, or dirty oil filters.
If the unit is shutting down on (HOT) High Oil Tempera-
ture or Low Oil Pressure (OP), change the oil filter ele-
ment. Examine the oil filter element for the presence of
aluminum particles. If aluminum particles are noticeable
and the same conditions continue to stop the unit op-
eration after a new filter element is installed, notify the
nearest YORK office to request the presence of a YORK
service man.
It is the responsibility of the owner to provide the neces-
sary daily, monthly and yearly maintenance require-
ments of the system. IMPORTANT: If a unit failure
occurs due to improper maintenance during the war-
ranty period; YORK will not be liable for costs incurred
to return the system to satisfactory operation.
In any operating system it is most important to provide
a planned maintenance and inspection of its function-
ing parts to keep it operating at its peak efficiency. There-
fore, the following maintenance should be performed
when prescribed.
COMPRESSOR
1. Oil Filter - The oil filter must be changed when the oil
pressure drops 30% or semi-annually if not required
earlier.
When the oil filter is changed it should be inspected
thoroughly for any aluminum particles which would
indicate possible bearing wear. If aluminum particles
are found this should be brought to the attention of
the nearest YORK office for their further investiga-
tion and recommendations.